Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
140018excellentexcellent71excellent
130029goodexcellent61excellent
120036goodexcellent71excellent
110034goodexcellent61excellent
100034goodexcellent51excellent
090025goodexcellent41excellent
080032goodexcellent31excellent
070026goodexcellent21excellent
060023goodexcellent11excellent
050024goodexcellent11excellent
040022goodexcellent11excellent
030021goodexcellent11excellent
020021goodexcellent21excellent
010019excellentexcellent21excellent
000019excellentexcellent21excellent
230027goodexcellent31excellent
220022goodexcellent11excellent
210017excellentexcellent11excellent
200021goodexcellent11excellent
190024goodexcellent11excellent
180023goodexcellent11excellent
170020excellentexcellent11excellent
160026goodexcellent11excellent
150021goodexcellent11excellent